примерно так
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<link rel="stylesheet" href="style.css" id="styles">
</head>
<body>
<button class="change style">Сменить стили</button>
<script>
const link = document.querySelector('#styles');
const button = document.querySelector('.change');
button.onclick = ({ target }) => {
if (target.classList.contains('style')) {
target.classList.remove('style');
link.href = 'blind.css';
}
console.log(link.href)
}
</script>
</body>
</html>
Простой
